Study On Safety Evaluation Index Of Slope Prestressed Anchor Cable

Pre-stressed anchor cable technology is widely used in slope supporting projectwith its virtues, such as speedy reinforcing effect, good dependability, economical andso on. However, many slope anchorage instability examples tell us, anchor engineeringis not a permanent protection. Particularly, because of the hidden features of the slopereinforcement works, under the influence of the natural environment or human factors,the internal structure or force state of the anchor slope of rock and soil, The same time,because of the anchor project in the design and construction process will inevitablylead to errors or defects, potential threat to the existence of slope instability may not bealert. Once the anchor project destroyed, country will cause huge economic losses andcasualties.In this paper, on the basis of the previous analysis of prestressed anchor failuremode and the failure of the main influencing factors, for anchoring in slopeengineering safety evaluation analysis of indicators, the major work completed in thispaper:1．Starting from slope reinforcement mechanism of pre-stressed anchor, studiedthe impact of factors affecting slope stability2．This paper pointes out that the master of the carrying capacity of pre-stressedanchor common failure mode corresponds to the anchor bearing capacity of the masterfactors, The mechanical model of the anchoring segment has been completed, and thetheoretical formula of bond failure under ultimate pullout force.3．For the impact indicators of anchoring the bearing capacity, this paperestablishes finite element simulation of the pullout test by numerical analysis ofANSYS software. For both the characteristics of pre-stressed anchorage cable, thepaper establishes finite element simulation loss of pre-stress impact on slope stabilityanalysis.4．For theoretical analysis and numerical results, this paper selects safetyevaluation index of slope pre-stressed anchor cable and analyzes the safety evaluationindex.